为空时隐藏 ACF 字段

Question

我将以下代码用于带有自定义字段的 wordpress 模板：

<?php

// vars
$special_product = get_field('special_product', $term); 

if (!get_field('special_product') )
if ( $special_product): ?>
<div class="container_wrap container_wrap_first main_color sidebar_right 
template-shop">
  <div class="container">
    <div class="container-left-sp single-product-main-image alpha">

    <a class="lightbox-added lightbox avia_image" href="<?php echo $special_product['image']['url']; ?>"  rel="lightbox" title="" rel="product_images[grouped]">
    <img src="<?php echo $special_product['image']['url']; ?>" alt="<?php echo $special_product['image']['alt']; ?>" /></a>

    <div class="thumbnails">

    <a class="lightbox-added lightbox avia_image thumb-image" href="<?php echo $special_product['thumb1']['url']; ?>"  rel="lightbox" title="" rel="product_images[grouped]">
    <img width="100" height="100" src="<?php echo $special_product['thumb1']['url']; ?>" class="attachment-shop_thumbnail size-shop_thumbnail" alt="<?php echo $special_product['thumb1']['alt']; ?>" /></a>
           <a class="lightbox-added lightbox avia_image thumb-image" href="<?php echo $special_product['thumb2']['url']; ?>"  rel="lightbox" title="" rel="product_images[grouped]">
    <img width="100" height="100" src="<?php echo $special_product['thumb2']['url']; ?>" class="attachment-shop_thumbnail size-shop_thumbnail" alt="<?php echo $special_product['thumb2']['alt']; ?>" /></a>
           <a class="lightbox-added lightbox avia_image thumb-image" href="<?php echo $special_product['thumb3']['url']; ?>"  rel="lightbox" title="" rel="product_images[grouped]">
    <img width="100" height="100" src="<?php echo $special_product['thumb3']['url']; ?>" class="attachment-shop_thumbnail size-shop_thumbnail" alt="<?php echo $special_product['thumb3']['alt']; ?>" /></a>
    </div>

</div>
<div class="container-right-sp single-product-summary">
    <?php echo $special_product['description']; ?>
    <a class="avia-slideshow-button avia-button avia-color-orange avia-multi-slideshow-button" href="<?php echo $special_product['product-link']['url']; ?>">
    Zum Produkt</a>
    </div>    

        <div>
</div>
</div> <!--close container -->
</div>   <!--close container_wrap --> 

<?php endif; ?>

使用代码 if (!get_field('special_product') ) 我尝试在自定义字段为空时隐藏它，但它不起作用。怎么隐藏？

最好的问候

克里斯

补充： &special_product 的输出（当自定义字段为空时）是：

数组（[图片] => [描述] => [产品链接] => [thumb1] => [thumb2] => [thumb3] => ）

Answer 1

运行 print_r($special_product) 时，您得到：

Array ( [image] => [description] => [product-link] => [thumb1] => [thumb2] => [thumb3] => )

因为空字段返回的是一个空数组而不是什么都没有，它永远不能被认为是空的，你需要从数组中检查一个键来查看键值是否为空。

我告诉它检查该数组的图像字段是否为空。

如果您的产品不总是有图片，请随意更改它以检查始终存在的字段。

这是你的工作代码：

// vars
$special_product = get_field('special_product', $term); 

<?php if ( $special_product['image'] ): ?>
    <div class="container_wrap container_wrap_first main_color sidebar_right 
    template-shop">
        <div class="container">
            <div class="container-left-sp single-product-main-image alpha">
                <a class="lightbox-added lightbox avia_image" href="<?php echo $special_product['image']['url']; ?>"  rel="lightbox" title="" rel="product_images[grouped]">
                <img src="<?php echo $special_product['image']['url']; ?>" alt="<?php echo $special_product['image']['alt']; ?>" /></a>

                <div class="thumbnails">
                    <a class="lightbox-added lightbox avia_image thumb-image" href="<?php echo $special_product['thumb1']['url']; ?>"  rel="lightbox" title="" rel="product_images[grouped]">
                    <img width="100" height="100" src="<?php echo $special_product['thumb1']['url']; ?>" class="attachment-shop_thumbnail size-shop_thumbnail" alt="<?php echo $special_product['thumb1']['alt']; ?>" /></a>
                    <a class="lightbox-added lightbox avia_image thumb-image" href="<?php echo $special_product['thumb2']['url']; ?>"  rel="lightbox" title="" rel="product_images[grouped]">
                    <img width="100" height="100" src="<?php echo $special_product['thumb2']['url']; ?>" class="attachment-shop_thumbnail size-shop_thumbnail" alt="<?php echo $special_product['thumb2']['alt']; ?>" /></a>
                    <a class="lightbox-added lightbox avia_image thumb-image" href="<?php echo $special_product['thumb3']['url']; ?>"  rel="lightbox" title="" rel="product_images[grouped]">
                    <img width="100" height="100" src="<?php echo $special_product['thumb3']['url']; ?>" class="attachment-shop_thumbnail size-shop_thumbnail" alt="<?php echo $special_product['thumb3']['alt']; ?>" /></a>
                </div>
            </div>
            <div class="container-right-sp single-product-summary">
                <?php echo $special_product['description']; ?>
                <a class="avia-slideshow-button avia-button avia-color-orange avia-multi-slideshow-button" href="<?php echo $special_product['product-link']['url']; ?>">
            Zum Produkt</a>
            </div>    
        </div> <!--close container -->
    </div>   <!--close container_wrap --> 
<?php endif; ?>